been shooting ribteks since 90s.....have a bunch of 160s and 190s....love them. I bought some Grizzly Kodiak 200gr I am trying on our whitetail season that starts in two days.....
interested to see how they work for you....but yeah, go to Grizzly or another site and copy grind based on their pics for a left bevel since you have left wing fletching.
I too like the ribbies like they are...hold a good edge, sharpen easy once you get them done once....and put a tanto tip on them and they are pretty tough on anything.
good luck